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Finding the Fourth Proportional to 64,837.60, 97,249.20 and 53,130.40

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Solution

The fourth proportional to 64,837.60, 97,249.20 and 53,130.40 is: 79,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,837.60 : 97,249.20 = 53,130.40 : x
  2. Step 2: Convert to fraction form
    64,837.60/97,249.20 = 53,130.40/x
  3. Step 3: Cross multiply
    64,837.60x = 97,249.20 × 53,130.40
  4. Step 4: Simplify right side
    64,837.60x = 5,166,888,895.68
  5. Step 5: Solve for x
    x = 5,166,888,895.68/64,837.60
  6. Step 6: Final answer
    x = 79,689.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.